A’s designate Klay’s brother Trayce Thompson for assignment

Outfielder Trayce Thompson, brother of Warriors guard Klay Thompson, was designated for assignment Thursday.OAKLAND — It turns out the Athletics’ most notable early-season roster splash barely created a ripple.

Trayce Thompson, the brother of Warriors’ guard Klay Thompson who was claimed off waivers on April 5, was designated for assignment Tuesday in advance of their 50th anniversary game at the Coliseum against the Chicago White Sox.

The move places Thompson back on waivers, where he can be claimed by another team. If no team comes calling, the A’s could send Thompson to Class AAA Nashville.

The Athletics needed to make a move to promote Trevor Cahill, who will start against the White Sox.…